Continuum subtracted profile of the H₂O 4₂₃ − 3₃₀ 448 GHz emission in ESO 320-G030 extracted using a circular aperture with centered at the nucleus (see Fig. 2). The dotted green line is the normalized CO(2−1) profile extracted from the same region. The black vertical line indicates the systemic velocity derived from the CO(2−1) global kinematic model (PS16). The red solid line is the best Gaussian fit to the water profile (see Sect. 3).